Congenital myopathies. Myopathies with early contractures. Myotonic disorders. Periodic paralyses. Malignant Hyperthermia. Mitochondrial cytopathies. Disorders of carbohydrate metabolism. Disorders of lipid metabolism. Investigation of suspected metabolic myopathy. Lysosomal myopathies. Distal myopathies. Hereditary inclusion body myositis. Sporadic inclusion body myositis. Autoimmune inflammatory myopathies. Infective myopathies. Toxic myopathies. Endocrine myopathies. Muscle disorders associated with aging. Muscle cramp syndromes. Miscellaneous disorders.